83963 ÷ 8 = 10495 R3
Let's divide 83963 by 8.

Step 1:
8 goes into 8 1 times with a remainder of 0.
Write down 1 as next digit of of the result. 
Result so far: 1
Subtract 8 from 8 to get 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 8

Step 2:
8 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of of the result. 
Result so far: 10
Subtract 0 from 3 to get 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 8

Step 3:
8 goes into 39 4 times with a remainder of 7.
Write down 4 as next digit of of the result. 
Result so far: 104
Subtract 32 from 39 to get 7.
Bring next digit (6) of the dividend behind the 7 and repeat the process: 76 / 8

Step 4:
8 goes into 76 9 times with a remainder of 4.
Write down 9 as next digit of of the result. 
Result so far: 1049
Subtract 72 from 76 to get 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 8

Step 5:
8 goes into 43 5 times with a remainder of 3.
Write down 5 as next digit of of the result. 
Result so far: 10495
Subtract 40 from 43 to get 3.

The final result is 10495 with a remainder of 3.